Fabrication of single crystalline gold nanobelts

Chen, Ying; Somsen, Christoph; Milenković, Srdjan; Hassel, Achim Walter

doi:10.1039/b816897k

Cited by 35 publications

(53 citation statements)

References 32 publications

(51 reference statements)

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“…The appearance of these shorter structures results from the ultrasonication process, which can break longer nanobelts with their high aspect ratio of more than 2000 due to the high oscillatory energy induced. As described before, [35] these Au nanobelts have an average thickness and width of 25-30 nm and 250 nm, respectively. The average length is about 20 mm.…”

Section: Physicochemical Characterization Of Au Nanobeltsmentioning

confidence: 97%

Reactivity of Gold Nanobelts with Unique {110} Facets

2010

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Gold nanobelts were synthesized by directional solidification of the Fe-Au eutectoid followed by selective phase dissolution. Cleaning from organic molecules was performed in alkaline solution by PbO(2) deposition/dissolution to avoid surface reconstruction. The electrochemical behaviour of the Au nanobelts was determined by structure-sensitive electrochemical reactions, and the findings confirm the results obtained by selected area electron diffraction (SAED). The underpotential deposition (UPD) of lead under alkaline conditions and cyclic voltammograms (CVs) in sulphuric acid revealed an unusual large amount of (110) domains (>65%). Finally, after cleaning the Au nanobelts showed a higher and stable electrocatalytic behaviour toward methanol oxidation in alkaline media. The possible mechanism and the potential applications of the Au nanobelts are discussed.

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Section: Physicochemical Characterization Of Au Nanobeltsmentioning

confidence: 97%

Reactivity of Gold Nanobelts with Unique {110} Facets

2010

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“…Figure 12d presents the SAED pattern of gold nanobelts, which demonstrates that the gold nanobelt is a single crystal and the lateral facets of the nanobelt are presented by {110} planes. For fcc metal nanoplates and nanobelts, the {110} surfaces are rarely seen [62][63][64][65], due to their high surface free energy compared to the dominating {111} surface. In the present case, gold nanobelts grow cooperatively and concurrently with the iron matrix and during the growth develop a certain crystallographic orientation relationship with the matrix, in order to minimize overall interface energy.…”

Section: Fe-au Systemmentioning

confidence: 98%

Preparation and specific properties of single crystalline metallic nanowires

Hassel

Bello-Rodriguez

Sutherland-Smith

et al. 2010

Physica Status Solidi (b)

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Directional solidification of eutectics is a route to produce isooriented metallic single crystalline nanowires (NWs). Etching or electrochemical oxidation allows selective dissolution of either of the phases to produce NW arrays, isolated NWs, nanopore arrays and also derived structures by combining various process steps. A good understanding of the thermodynamics and the kinetics of the phase transformation and chemical reactions including electrodissolution, passivation, selective etching, complexing of reaction products and electrodeposition in the systems NiAl-X (X ¼ Re, W, Mo), Ag-Cu and Fe-Au was reached. Functional devices based on these NWs, like high aspect ratio NW based STM tips, nanoelectromechanical systems (NEMS), NW pH sensors and sensor arrays were constructed.Array of rhenium single crystalline NWs embedded in the NiAl matrix after partial dissolution of the matrix.

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“…After being calcined at 900 °C, the width and thickness of nanobelts greatly decreased due to the decomposition of the organic species and the formation of inorganic phase. Figure 7 showed the excitation spectra of YAG: x%Eu 3+ [x=1, 3,5,7] nanobelts monitored at 592 nm. The prominent peak at 235 nm was associated with the charge transfer band (CRT) of O 2--Eu 3+ .…”

Section: Sem Analysismentioning

confidence: 99%

“…The chromaticity coordinates of YAG: x%Eu 3+ [x=1, 3,5,7] nanobelts were indicated in Figure 9. The coordinates (X, Y) of YAG: Eu 3+ nanobelts excited by 235 nm were (0.4394, 0.5306), (0.5137, 0.4703), (0.5300, 0.4556) and (0.5536, 0.4369), which correspond to the Eu 3+ concentrations of 1%, 3%, 5% and 7%, respectively, as revealed in Figure 9.…”

Section: Cie Analysismentioning

confidence: 99%